作　　者： ; ; ; ;

机构地区： 成都理工大学

出　　处： 《矿物岩石》 2003年第2期72-74,共3页

摘　　要： 根据花岗岩同源岩浆演化系列 ,将汉源平等复式花岗岩体划分为 6个单元 ,归并为一个超单元。岩石类型以二长花岗石、钾长花岗岩为主体 ,具明显的成分—结构演化特征。岩石化学以富硅、钾 ,贫钙 ,岩石稀土以具明显的铕负异常为特征。本超单元同位素年龄为 6 5 0 Ma～ 70 0 Ma,它是澄江期非造山带 ,沿火山裂谷侵位的 A型花岗岩。 According to the theory of the consanguinity of magma and the evolution order,the multiple granite in Pingdeng can be devided into six units,whic incorporated into a super-unit. The rock type mainly includes adamanite,moyite which have distinct features of texture and composition respectively.The petrochemistry is characterized by rich-silicon,rich-potassium,poorcalcium,and appearant loss of Eu element.The isotopic age of the supper-unit is between 650 Ma to 700 Ma.The rock is A-type granite,which invaded volcano rift in anorogenic Chengjiang Period.

关 键 词： 四川 汉源平等 澄江期 型花岗岩 同源岩浆演化序列 同位素年龄 超单元

领　　域： [天文地球] [天文地球] [天文地球] [天文地球]